Если функция задана параметрическими уравнениями\{ \begin{array}{ccc} y=y\left(t\right)\\x=x\left(t\right)\ \end{array} , то \left(y\left(x\right)\right)^{'}= \frac{\left(x\left(t\right)\right)^{'}}{\left(y\left(t\right)\right)^{'}}, \frac{\left(y\left(t\right)\right)^{'}}{\left(x\left(t\right)\right)^{'}}, \frac{y'(t)x(t)-x'(t)y(t)}{x^2(t)}, \left(y\left(t\right)\right)^{'} +\left(x\left(t\right)\right)^{'}, \left(y\left(t\right)\right)^{'} \cdot \left(x\left(t\right)\right)^{'}